A Study of Light
tear film has a refractive index of
one point three three six, which is
only notable if you are studying for an exam
or performing in an exam
or performing an exam
the refractive index of crown glass, the stuff
of which cathedral windows are made, is
one point three nine eight, which makes
a difference of
zero point zero six two
in this dimensionless quantity, unitless number,
between the outermost layer of our eyes
and the reflection, made lustrous by fire-polish,
of sun through Sainte-Chapelle
Martina Preston is a cake artist, journalist, and poet from the Pacific Northwest. She writes regularly for national periodicals and has poetry and fiction published in several literary journals.